B1A37–SECURITY TRANSMITTER SENSOR CIRCUIT LOW

For a complete wiring diagram Refer to Section 8W.

When Monitored:
When the VTSS is armed.
Set Condition:
If the current flow on the sensor signal circuit is above a specified range this DTC will set.

Possible Causes

(A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

INTRUSION SENSOR TRANSMITTER

INTRUSION TRANSCEIVER MODULE

1.TEST FOR INTERMITTENT CONDITION

Does the scan tool display B1A37–SECURITY TRANSMITTER SENSOR CIRCUIT LOW ?

Yes

The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

2.INTRUSION SENSOR TRANSMITTER

Does the scan tool display B1A41–SECURITY TRANSMITTER SENSOR CIRCUIT OPEN?

Yes

Replace the Intrusion Sensor Transmitter.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

3.CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT SHORT TO GROUND

Is the resistance below 5.0 ohms?

Yes

Repair the (A645) Intrusion Transmitter Sensor Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Replace the Intrusion Transceiver Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1 (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)